2021
DOI: 10.3389/fmicb.2021.753202
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Transcriptomic and Ultrastructural Analyses of Pyricularia Oryzae Treated With Fungicidal Peptaibol Analogs of Trichoderma Trichogin

Abstract: Eco-friendly analogs of Trichogin GA IV, a short peptaibol produced by Trichoderma longibrachiatum, were assayed against Pyricularia oryzae, the causal agent of rice blast disease. In vitro and in vivo screenings allowed us to identify six peptides able to reduce by about 70% rice blast symptoms. One of the most active peptides was selected for further studies. Microscopy analyses highlighted that the treated fungal spores could not germinate and the fluorescein-labeled peptide localized on the spore cell wall… Show more

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Cited by 12 publications
(19 citation statements)
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“…In conclusion, with this study, it seems possible to indicate the antimicrobial effect as the only mechanism behind the plant protection ability exerted by Trichogin GA IV-derived peptides. The antimicrobial effect shown on leaves likely affected conidial germination, in a way similar to what we reported in vitro ( De Zotti et al, 2020 ; Sella et al, 2021 ). Since B. cinerea hyphae are similarly susceptible to Pep 4 treatment (unpublished results), we hypothesize that the peptides cannot overcome the leaf cuticle to target the infectious hyphae in the leaf mesophyll.…”
Section: Discussionsupporting
confidence: 79%
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“…In conclusion, with this study, it seems possible to indicate the antimicrobial effect as the only mechanism behind the plant protection ability exerted by Trichogin GA IV-derived peptides. The antimicrobial effect shown on leaves likely affected conidial germination, in a way similar to what we reported in vitro ( De Zotti et al, 2020 ; Sella et al, 2021 ). Since B. cinerea hyphae are similarly susceptible to Pep 4 treatment (unpublished results), we hypothesize that the peptides cannot overcome the leaf cuticle to target the infectious hyphae in the leaf mesophyll.…”
Section: Discussionsupporting
confidence: 79%
“…Peptaibols possess interesting features also for plant protection purposes. Indeed, they have been found to act as antimicrobial molecules against plant pathogens ( Shi et al, 2012 ; Zeilinger et al, 2016 ; De Zotti et al, 2020 ; Sella et al, 2021 ) and to elicit defense reactions in various plants ( Engelberth et al, 2000 ; Viterbo et al, 2007 ; Luo et al, 2010 ; Rippa et al, 2010 ). It is not clear whether peptaibols may act as defense priming stimuli ( Mauch-Mani et al, 2017 ; Baccelli et al, 2020 ).…”
Section: Introductionmentioning
confidence: 99%
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